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    Impacts of Anthropogenic Heat on Summertime Rainfall in Beijing

    Source: Journal of Hydrometeorology:;2016:;Volume( 018 ):;issue: 003::page 693
    Author:
    Nie, Wanshu
    ,
    Zaitchik, Benjamin F.
    ,
    Ni, Guangheng
    ,
    Sun, Ting
    DOI: 10.1175/JHM-D-16-0173.1
    Publisher: American Meteorological Society
    Abstract: nthropogenic heat is an important component of the urban energy budgets that can affect land surface and atmospheric boundary layer processes. Representation of anthropogenic heat in numerical climate modeling systems is therefore important when simulating urban meteorology and climate and has the potential to improve weather forecasts, climate process studies, and energy demand analysis. Here, spatiotemporally dynamic anthropogenic heat data estimated by the Building Effects Parameterization and Building Energy Model (BEP-BEM) are incorporated into the Weather Research and Forecasting (WRF) Model system to investigate its impact on simulation of summertime rainfall in Beijing, China. Simulations of four local rainfall events with and without anthropogenic heat indicate that anthropogenic heat leads to increased rainfall over the urban area. For all four events, anthropogenic heat emission increases sensible heat flux, enhances mixing and turbulent energy transport, lifts PBL height, increases dry static energy, and destabilizes the atmosphere in urban areas through thermal perturbation and strong upward motion during the prestorm period, resulting in enhanced convergence during the major rainfall period. Intensified rainfall leads to greater atmospheric dry-down during the storm and a higher poststorm LCL.
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      Impacts of Anthropogenic Heat on Summertime Rainfall in Beijing

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4225577
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    • Journal of Hydrometeorology

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    contributor authorNie, Wanshu
    contributor authorZaitchik, Benjamin F.
    contributor authorNi, Guangheng
    contributor authorSun, Ting
    date accessioned2017-06-09T17:17:20Z
    date available2017-06-09T17:17:20Z
    date copyright2017/03/01
    date issued2016
    identifier issn1525-755X
    identifier otherams-82461.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4225577
    description abstractnthropogenic heat is an important component of the urban energy budgets that can affect land surface and atmospheric boundary layer processes. Representation of anthropogenic heat in numerical climate modeling systems is therefore important when simulating urban meteorology and climate and has the potential to improve weather forecasts, climate process studies, and energy demand analysis. Here, spatiotemporally dynamic anthropogenic heat data estimated by the Building Effects Parameterization and Building Energy Model (BEP-BEM) are incorporated into the Weather Research and Forecasting (WRF) Model system to investigate its impact on simulation of summertime rainfall in Beijing, China. Simulations of four local rainfall events with and without anthropogenic heat indicate that anthropogenic heat leads to increased rainfall over the urban area. For all four events, anthropogenic heat emission increases sensible heat flux, enhances mixing and turbulent energy transport, lifts PBL height, increases dry static energy, and destabilizes the atmosphere in urban areas through thermal perturbation and strong upward motion during the prestorm period, resulting in enhanced convergence during the major rainfall period. Intensified rainfall leads to greater atmospheric dry-down during the storm and a higher poststorm LCL.
    publisherAmerican Meteorological Society
    titleImpacts of Anthropogenic Heat on Summertime Rainfall in Beijing
    typeJournal Paper
    journal volume18
    journal issue3
    journal titleJournal of Hydrometeorology
    identifier doi10.1175/JHM-D-16-0173.1
    journal fristpage693
    journal lastpage712
    treeJournal of Hydrometeorology:;2016:;Volume( 018 ):;issue: 003
    contenttypeFulltext
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